Masaki Ando is a determined pilot commanding the unique humanoid weapon Cybuster, recognized as the "Elemental Lord of the Wind." He is driven by his pursuit of nemesis Shu Shirakawa to settle their unresolved conflict. This personal quest draws him into the war between the Earth Federation Army and the rebel Divine Crusaders, as Shu Shirakawa was instrumental in founding and backing the Divine Crusaders' rebellion against the Earth government.

Initially acting alone due to his vendetta, Masaki's path intersects with the Earth Federation forces during their joint assault on the Divine Crusaders' Aidoneus Island headquarters. The Federation formally proposes an alliance, offering Masaki and the Federation a mutual opportunity to achieve their goals concerning Divine Crusaders leaders Bian Zoldark and Shu Shirakawa. After consideration, Masaki aligns temporarily with the Federation forces.

He is accompanied by his assisting companions, the cats Kuro and Shiro. Masaki and the Cybuster become notable factors in key battles against the Divine Crusaders' advanced weaponry and pilots, including the Treue Unit and their Barrelion Armored Modules.